Load-deflection behavior of over-and under-reinforced concrete beams with hybrid frp-steel reinforcements

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dc.contributor.authorKartal, Saruhan
dc.contributor.authorKalkan, Ilker
dc.contributor.authorBeycioglu, Ahmet
dc.contributor.authorDobiszewska, Magdalena
dc.date.accessioned2025-01-21T16:28:01Z
dc.date.available2025-01-21T16:28:01Z
dc.date.issued2021
dc.departmentKırıkkale Üniversitesi
dc.description.abstractThe present study pertains to the load-deflection behavior and cracking moments of concrete beams with hybrid FRP-steel reinforcement. Under and over-reinforced hybrid beams were tested for failure along with reference beams with only steel or FRP reinforcement. The first-cracking moments of the beams were estimated analytically by using different uncracked moments of the inertia and modulus of rupture definitions. The uncracked moment of inertia definitions include the gross and uncracked transformed moments. The adopted modulus definitions are comprised of the experimental values from tests on prisms and the analytical values from the equations in different concrete codes. Furthermore, analytical methods were developed for estimating the deflections of concrete beams with hybrid FRP-steel or only FRP reinforcement. Two different types of elastic moduli, namely the secant modulus corresponding to the extreme compression fiber strain and the ACI 318M-19 modulus, were used in deflection calculations. Closer estimates were obtained by using the secant modulus, particularly in hybrid-reinforced beams. In the post-yielding region of the steel tension reinforcement, the deflection estimates were established to lay in closer proximity to the experimental curve when obtained by adding up the deflection increments instead of directly calculating the total deflections from the elastic curve equation. Accurate estimation of the cracking moment was found to be vital for the close prediction of deflections. © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
dc.description.sponsorshipKırıkkale Üniversitesi, KU, (2016/073); Narodowa Agencja Wymiany Akademickiej, NAWA, (PPI/APM/2019/1/00003)
dc.identifier.doi10.3390/ma14185341
dc.identifier.issn1996-1944
dc.identifier.issue18
dc.identifier.scopus2-s2.0-85115315124
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.3390/ma14185341
dc.identifier.urihttps://hdl.handle.net/20.500.12587/23452
dc.identifier.volume14
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherMDPI
dc.relation.ispartofMaterials
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241229
dc.subjectEffective moment of inertia; First-cracking moment; Flexural cracking; FRP rupture; Fully cracked section; Tension stiffening
dc.titleLoad-deflection behavior of over-and under-reinforced concrete beams with hybrid frp-steel reinforcements
dc.typeArticle

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